Spark-arrester



(No Model.) C. H. WATERS.

SPARK ARRESTER.

No. 250,313. Patented Nov. 29,1881.

N. PETERS. Phum-Lhhgmphur. Washington. D. C.

UNITED STATES PATENT EETCE..

CHARLES H. WATERS, OF GROTON, MASSACHUSETTS.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 250,313, dated November 29, 1681.

` Application filed April 25, 1881. (No model.)

To all whom it may concern:

Be it known that I, CHARLES H. WATERS, of Groton, in the county of Middlesex and State of Massachusetts, have invented certain Improvements in Spark-Arresters, of which the following is a specification.

The present invention relates to the slotted basket or screen pipe cylinder employed in spark-arresters of the classdescribed in United States Letters Patent No. 223,427, dated January 6, 1880, to intercept and disintegrate the cinders before they are allowed to enter the smoke-stack.

The invention has for its objectto provide certain improvements in the construction of said slotted basket, when the same is made of parallel angular bars separated by spaces, which constitute the slots through which the cinders and sparkspass to the smoke-stack, said improvements enabling the parts of the slotted basket to be expeditiously and conveniently arranged in operative position and held so that there can be no lateral springing or deiiection of the bars to vary the width of the slots between them.

To this end my invention consists in a slotted basket or screen pipe composed of parallel angular bars, arranged to present salient angies at the outer surface of the basket and at the opposite side of the slots, as hereinafter described, secured together at their opposite ends and clamped at intermediate points between external and internal bands adapted to prevent lateral movement of the bars in any direction, as I will now proceed to describe and claim, reference being' had to the accompanying drawings, forming part of this speciiication, in which` Figure l represents a horizontal section, on line xx, Fig. 2, of a perforated cylinder or liftpipe embodying my invention. Fig. 2 represents an elevation of a portion of the same. Fig. 3 represents a section on line y y, Fig. 2. Figs. 4 and 5 represent details, nearly full size. Fig. 6 represents a modification.

In all these figures similar letters refer to the same parts.

In the drawings, c represents a basket or screen pipe, adapted to be placed over the exhaust-steam outlets within the smoke-arch of a locomotive, and to t down closely to the floor of the smokearch, as set forth in the before-nan1ed Letters Patent No. 223,427. The basket c extends, preferably, from the door to the top ot' the smoke-arch, and said basket consists ot vertical parallel metal bars b, angular in cross-section and preferably aboutone-iourth of an inch square, confined at bottoni and top by suitable metallic collarsor rings, d, into which the ends of the bars b are inserted. The bars b are placed diagonally with the radius ofthe cylinder, (most clearly shown in Fig. 5,) and said bars are placed about cight-sixteenths of an inch from center to center, or so as to leave a clear space of about three-sixteentbs of an inch for the passage ofsmoke'and cinders between the bars, although these distances may be varied, if found desirable in practice, without departing from the spirit of my invention.

It is importantthat the slits be ofv uniform width from end to end, so that no part of any slit will permit the passage of larger cindcrs or f'ragments than other parts.

The bars are confined and maintained at the desired distance apart by metallic bands or hoops e, which are formed with shoulders f, inclined relatively to each other and adapt-ed to coincide with the exterior faces, 2 2, of the bars b, (see Fig. 5,) and to closely hug said bars, and thus prevent any sidewise or rotary movement of the bars and maintain them in their relative positions at certain fixed distances apart. An internal metallic band, g, which -may be plain, as shown, or shouldered, like the bands e, bears upon the inner surface of the bars b near each band c, the bands c and g being suitably fastened together, preferably by bolts or rivets h, or otherwise secured.

In Fig. 4 a portion of the band e is shown detached from the cylinder.

The fastening devices h pass through the slots between the bars b and securely bind the bands e and g upon the bars, so that the bars do not require to be riveted or attached to the bands. It will be observed, therefore, that the bands can be very quickly applied, so that the operation of securing the bars against lateral movement at points between their ends is effected most expeditiously and effectively. The shouldered bands are preferably made by casti ing, so that their shoulders are placed at uni- IOO through said openings.

form distances apart, and therefore insure uniformity in the width of the slots between the bars b.

1n an organized spark-arrester the cylinder c is surrounded by a aring hood, 8vo., as shown in Letters Patent No. 223,427, above referred to, the general operation of the device being as therein set forth; but I do not'J confine myself to a iiaring hood, as a straight cylinder hood will answer the same purpose.

It will be observed that the angular bars b, arranged as shown, present salient angles 1 at their outer sides, which serve to split or disintegrate the cinders and sparks impinging upon them, and converging sides, 2 2, (see Fig. 5,).which receive and guide the cinders and sparks to the spaces or slots 4 between the bars, and, in consequence ot' the obtuseness and uniformity of their inclination, do not enable the sparks and cinders to become wedged between the bars. The bars b also present opposing sides 2 2 and 5 5, which form the sides of the openings 4, and apexes or angles 3 3, which assist in the reduction of sparks and cinders entering said openings. The inner surfaces ofthe bars, w hen the latter are rectangular in cross-section, diverge abruptly from I the openings 4, and furnish a free passage for the reduced sparks and cinders that pass I do not limit myself to forming the inner surfaces of the bars as above described, however, as said surfaces may be flat, as shown in the modification, Fig. 6, the bars in this instance being triangular in cross-section.

It' desired, the bars may be polygonal or rhomboidal in cross-section without departing from the spirit of my invention, so long as the arrangement is such as to afford the converging surfaces 2 2, extending from the outer portions of the bars to the slits 4 without variations of their inclination, and,

Having thus described my invention, I claim- In a spark-arrester, the improved slotted basket or screen pipe, composed of parallel vertical angular bars, arranged as shown, secured together at their opposite ends and clamped at intermediate points betweenexternal and internal bands, one or both of which are shouldered to fit upon and afford lateral support to the bars, as set forth.

In testimony whereofl have signed my name to this specification, in the presence of two subscribing witnesses, this 23d day of April, A. l). 1881.

CHARLES H. WATERS.

Witnesses:

G. F. BROWN,

JOSEPH KELLEY. 

